TM 10-3930-659-34 5-1. ENGINE BLOCK MAINTENANCE (Con’t). WARNING Dry  cleaning  solvent,  P-D-680,  is  toxic  and  flammable.    Always  wear  protective  goggles  and gloves, and use only in a well-ventilated area.  Avoid contact with skin, eyes, and clothes, and DO NOT breathe vapors.  DO NOT use near open flame or excessive heat.  The solvent’s flash point is 100°F-138°F (38°C-590C).  If you become dizzy while using cleaning solvent, immediately get fresh air and medical help.  If solvent contacts eyes, immediately wash your eyes and get medical aid. 3. Remove all gasket material from engine block with dry cleaning solvent and dry with clean rags. 4. Clean all metal parts with dry cleaning solvent and dry with clean rags. 5. Inspect six fluid restrictors (17) in engine block (1) for damage.  Replace if damaged. WARNING Compressed air used for cleaning or drying purposes, or for clearing restrictions, should never exceed 30 psi (207 kPa).  Wear protective clothing (goggles/shield, gloves, etc.) and use caution to avoid injury to personnel. 6. Clean six fluid restrictors (17) with nonelectrical wire and compressed air. NOTE Main bearing caps and thrust bearing cap must be Installed in correct numbered location with identifying arrow facing camshaft side of engine block. 7. Apply lubricating oil to threads of 12 screws (16).  Install six main bearing caps (14) on engine block (1) with 12 washers (15) and screws.  Torque screws to 85 lb.-ft.  (115 N-m). 8. Apply  lubricating  oil  to  threads  of  two  screws  (20).    Install  thrust  bearing  cap  (18)  on  engine  block  (1)  with  two washers (19) and screws.  Torque screws to 85 lb.-ft.  (115 N-m). 9. Using   inside   caliper   micrometer,   measure   inside   diameter   of   main   bearing   bores   and   thrust   bearing   bore. Measurement must be 3.325-3.326 in.  (8.446-8.448 cm).  If either main bearing bore or thrust bearing bore is not within specification, replace engine block (1). 10. Remove two screws (20), washers (19), and thrust bearing cap (18) from engine block (1). 11. Remove 12 screws (16), washers (15), and six main bearing caps (14) from engine block (1). 5-4